Method of removing impurities from coal-gas.



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' has to he got rid Uflilillllillil hlfil ihllll ll ii GUSTAF HENRI HULTMAII,

.xrocunoom. SWEDEN.

METHQD OF REMOVING- YIIYTP'URIZIES YEIELOM (.OfuL-EHLS.

No Drawing:

Eli; oi! Qo/mm 1: may rumour.

l-lc it known that l. n'rwr .l-licu'irio; ll in:

ing' ul.

how: in. od now will l in illothods for Removing impuri. (hull-Hus, of which lnc following is u spou- ()rdiuory llllllllll'lllllllQ' gas contains anu'n'ig sulfur coun'uiuncls poi. mlfin'cloiil drown which can he removed by uicuTrS l, hyc iii-Ll iron oxide; or lime: in the usual n'uinncr, partly other sulfur co!upouiulc, cl'iiolly cons] Ling of carbon clisullid, and

which il. hm, so 'lur hccnviuiposshlc lo rcmore in :1 lllllllllfillll cutis'l'z'mhn'y nuinncr. ippig and "iruclununn have prl'q'ioscd to wash the: illun'iinuliiug gas with aunius, which in the washing process form chcmicul C0111- pounds with the (ifil'lifil'l disulllcl. Thcsc amino arc properly dissolvcd in alcohol. This method has, lunvcvcr. not conic inlo practical use. Partly the gain is vccycliglii and partly ()(JCIUS in the. reaction sul'l'urcliml hydrogen, which in some way or othcr of, and partly 'lhc :nnins used for washing cannot be. coniplclcly rcgcnorutcd. Anilin dissolved in alcohol has generally boon made use of for wushinc. I n the washing process the :milin lhcn ioruzs, lxigolluuvilli the carbon dioi'illid sull'ocurhuuilid and zwrilfunlicil liydrop cn. .l n ()l'l,l".l to obtain 1 hc'tlcr rctudlx in the washing proccos, attempts have also hccu mudc in cooling the to a low lcmperulurc, wilh lho inlcnlion of gelling i'hc sultl'ur coinpmi'odb to coiutlcnsc hcforc wishing. But no vcry good results u 'ipcmi lo liuvc hccn ohloiucd "with this. Attcuuiits to diss'olvo the amine: in ol'hci' substances l'hu alcohol, with or wilir out, thc addition of sulfur, mclnllic oxids. clc hui'c not led to any technically usolul inoll'iod. The absorption appears in llu) ahow-nieulioncd molhods of procmluro on an. avcragc lo have armuinlxcll lto 7094;. Of the. 21min used not more l lu-in Tl 57 can he recovcrcd on tho lin'os oi ihc fools: carried out. In this connection it l'lilr-l to lac li. ;crvc il that the part of the unlin which on account of the tension accompanies the gas, can mil y be recovered by washing the gas with sulfuric acid.

The present invention refers to :1 method for removing or recovering those sulfur com- Ap'plication filed .l-unc 3.

Specification of Lclous lu'tunl.

mlcnlcdScpt.23,1913.,

. uinl ollicr siuhwlunccs (a. hcnzol,

uu alnhulcnc) ll) wwsllaing tho illuminating in general with alcohol 1 lo ll or l .ciow, or with some othcr inn" lloid ij-oolcd to the sumo tcun'icruiurc, wlnch washing liluicl posscsses tho some ch21mclcmfu; quulll'y as alcohol of partly hc- :lijlll to lil'bCOl'll freezing of rho moisture g. ruled from tho on account of thc lull 'u lhc lPlllPCl'zlilllC and purlly to disolnllic mid onhstun ""l illuiuiuz-il'iug Q being washed with lll' fll o'l" un orilin-su'v licnipcralurc. no good 'n'plioi'i of the sulfur couipruu'uils is ohiz'i'inml. allhough tho luttcr :u-o solublc in uhohol under all (tHXKllhlOflFh If we, howc'vciu curry out the washing uroccsb with nlcoho] cooled to z: (1, for example. wc t u rcmarlcuhly good abscrplion, and l'hc washing, can l'JQ done without being inluvhcrcnl with by the formation of ice. as L u; iuoisluui mrpurulml from the gas blends with lho alcohol without freezing. It is of ili'ipi'ictuucc that thc washing fluid cooled. so lhut washinguctuully lakes place at a low lcu'ipcrziturc. The more cooling of the 2215 docs not produce the samc good result. Tcsls niudc have proved that tho absorption in. lluesc two cases is to each other as 825.

llnring thc washing process, which is curriccl out in u suituhlc \VilS-l'lQl', tho illuminating HHS .sciturutcrl wilh alcohol which eal'iould ho washed out willi water in order to recover the sonic, either in a separate washer or in onchuilt together with the first. in such a manner that, part of the alcohol which zurcompunics the gas is entirely recovorcd. The washing fluids from the two uaohcrs are subjected in a proper way to f,r ':1 :lionul (lin'l'illulion, by which means the sulfur compounds are separated or recovered. as the case may he, and the entire quantity of alcohol recovered for furthcr use in a proper way. To the washing fluid used may properly be added substances which form clicmical compounds with the washinglluirl or with those sultisl'unccs that are to ho washed out, in order to produce holler absorption and consequently lie-liter washing, or to facilitate further treatment 01 the washing fluid.

What I claim is:- A method for removing impurities from local gas (61. g. sulfur compounds, benzol.

naphthalene) bein washecl in alcohol cnolmi t0 (2 lowgarbly to prevent freezing of 31m ssparatel frem the gas 011 8(5001 5 low temperature and partly tn die Saki Substances.

In testimony WJ3i60f I; have signed v 

